Keyboard as an Input Device
Keyboard is a common input device used to input data into a computer. It is an essential tool for typing text, numbers, and commands. Here's why the correct answer to the question is option 'C' - Keyboard:

Physical Appearance
- A keyboard typically resembles a typewriter with keys for letters, numbers, symbols, and function keys.
- It also includes special keys like Enter, Shift, Ctrl, Alt, and Backspace.

Functionality
- The primary function of a keyboard is to input text and commands into a computer.
- It allows users to communicate with the computer and control various functions and applications.

Types of Keyboards
- Keyboards come in different types such as standard, ergonomic, mechanical, and virtual keyboards.
- Some keyboards also have additional features like multimedia keys, backlighting, and customizable keys.

Connectivity
- Keyboards can be connected to a computer using wired (USB) or wireless (Bluetooth) connections.
- They are compatible with various devices including desktops, laptops, tablets, and smartphones.

Importance
- Keyboards are essential for activities like typing documents, sending emails, browsing the internet, and playing games.
- They are widely used in homes, offices, schools, and other settings.
In conclusion, the keyboard is a vital input device that resembles a typewriter and is used for typing text and commands into a computer. It is a versatile tool with various types and features, making it an indispensable component of modern computing.